Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem é o Quarto Distrito de bob springstead?
 ###Tabelas: CREATE TABLE star_parivaar_awards (star_parivaar_awards_id AUTO_INCREMENT PRIMARY KEY, Year INT, Category VARCHAR, Character VARCHAR, For The Show VARCHAR, Result VARCHAR) CREATE TABLE broadcast_rights (broadcast_rights_id AUTO_INCREMENT PRIMARY KEY, Territory VARCHAR, Broadcaster VARCHAR, Channel INT, Launched VARCHAR, Closed VARCHAR) CREATE TABLE january_secondary_phase (january_secondary_phase_id AUTO_INCREMENT PRIMARY KEY, Round INT, Name VARCHAR, Position VARCHAR, School VARCHAR, Signed VARCHAR) CREATE TABLE current_members (current_members_id AUTO_INCREMENT PRIMARY KEY, First District VARCHAR, Second District VARCHAR, Third District VARCHAR, Fourth District VARCHAR, Fifth District VARCHAR) CREATE TABLE spaceflight_by_year (spaceflight_by_year_id AUTO_INCREMENT PRIMARY KEY, Rocket launch VARCHAR, Launch Date VARCHAR, Mission VARCHAR, Institutional authority VARCHAR, Launch Site VARCHAR, Outcomes VARCHAR, Derivatives VARCHAR)  
SELECT Fourth District FROM current_members WHERE Second District = bob springstead